Valve-operating mechanism for internal-combustion engines.



J. M. WHITE.

VALVE OPERATING MECHANISM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION TILED JUNE 25, 1812.

Patented Sept. 23, 1913.

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J. M. WHITE. VALVE OPERATING MECHANISM FOR INTERNAL COMBUSTION ENGINES.

APPLIOATION FILED JUNE 25, 1912.

Patented Sept. 23, 1913.

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JESSEE M. WHITE, 01E PHILADELPHIA, PENNSYLVANIA.

VALVE-OPERATING MECHANISM FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented Sept. 23, 11913.

Application filed June 25, 1912. Serial No. 705,685.

To all whom it may concern Be it known that I, Jnssnn M. Wnnn, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Valve-Operating Mechanism for Internal- Combustion Engines, of which the following is a specification.

My invention relates to improvements in valve operating mechanism for internal combustion engines, the object of the invention being to provide an improved arrangement of oscillating levers fulcrumed between their ends, and each end of the lever serving to engage a valve stem and control the opening and closing of the inlet and exhaust ports.

A further object is to provide an internal combustion engine with an improved arrangement of valve operating eccentrics and improved means for transmitting motion thereto, whereby the operation of the valves are accurately timed, and the opening of the valves rendered uniform with the employ ment of a minimum number of parts.

A further object is to provide improved valve controlling mechanism which receives positive operation through the medium of a worm and worm wheel connecting the crank shaft of the engine with an eccentric shaft at right angles thereto at one end of the crank case and geared in a ratio of one to two, and provide on said eccentric shaft a plurality of eccentrics mounted in suitable casings, so that they may be properly inclosed, and run in oil if desired, and pro-- vide oscillating levers operated by the ec centrics, each lever controlling the movement of two valves.

A further object is to provide an improved construction of valve operating eccentric in which ball bearings are employed between the eccentric proper and the ring, and the latter in engagement with parallel walls of a reciprocating bar, whereby the latter is reciprocated without any oscillatory movement.

WVith these and other objects in view, the invention consists in certain novel features of construction and combinations and arrangements of parts as will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawings: Figure 1 is a view in side elevation illustrating my improvements. Fig. 2 is a view in horizontal section on the line 2-2 of Fig. 1. Fig. 3 is a view in longitudinal section on an enlarged scale through the crank case. Fig. 1 1s a view in section on the line 4% of Fig. 3. Fig. 5 is a view in section through one of the eccentric casings illustrating the eccentrio and its bar in elevation. Fig. 6 is a view in section on the line 66 of Fig. 5, and Fig. 7 is a view illustrating a modification.

1, represents a crank case which is made in two separable sections permitting ready access to the crank shaft 2 and connecting rods 3. On one end of the crank shaft, a balance wheel 4 is secured and on top of the crank case, a series of engine cylinders 5 are mounted. These engine cylinders are water-jacketed as illustrated at (3, and they may be made in various ways, the T-head form shown being preferable but is for purposes of illustration only, as the invention is not limited to any particular kind of engine. The invention is, however, particularly applicable for engines having valve rods 7 extending down beside the cylinders, the exhaust valve rods being on one side of the engine, and the inlet valve rods on the other.

The valve rods 7 are connected to spring held valves so that when the rods 7 are moved upwardly, their valves will be opened and held open until said rods are permitted to descend. Below each pair of rods 7 is an oscillating or rocking lever 10 fulcrumed between its ends on journals 11 which are supported in brackets 11 on the crank case. The ends of these levers 10 are positioned below the lower ends of rods 7, so that when the levers are oscillated in one direction, they move certain of said rods 7 upwardly and when oscillated in the opposite direction, move the other of said rods 7 upwardly. All of the oscillating levers 10 are provided with depending arms 12. The depending arms 12 are secured to rods 13 and these rods 13 are pivotally connected by pins 14 with reciprocating bars 15. It is to be understood that there are four levers 10, four rods 13, and four reciprocating bars 15 in a four-cylinder engine. Where the number of cylinders is greater or less, these parts will be proportioned thereto.

The bars 15 are each reciprocated by eccentrics 16 fixed to an eccentric shaft 17 supported in bearings 18 and extending secured on said shaft, a crank shaft driven by the engine, and a Worm on said crank shaft meshing with the Worm wheel, substantially as described.

6. The combination with an engine, and valve moving rods at opposite sides thereof, of oscillating levers fulcrumed between their ends and having their ends located in line with the rods, arms on said levers, rods connected to said arms, bars connected to said rods and having parallel shoulders, eccentrics mounted to turn between the parallel shoulders on said bars, casings supporting and holding said bars against oscillating movement, ball bearing rings forming the outer surface of said eccentrics in contact with said shoulders, a shaft on which all of the eccentrics are mounted, a worm wheel secured on said shaft, a crank shaft driven by the engine, and a worm on said crank shaft meshing with the worm wheel, substantially as described.

7. The combination with an engine, and valve moving rods at opposite sides thereof, of oscillating levers fulcrumed between their ends and having their ends located in line with the rods, arms on said levers, rods connected to said arms, bars connected to said rods and having parallel shoulders, eccentrics mounted to turn between the parallel shoulders on said bars, casings supporting and holding said bars against oscillating movement, ball bearing rings forming the outer surface of said eccentrics in contact with said shoulders, a shaft on which all of the eccentrics are mounted, a worm wheel secured on said shaft, a crank shaft driven by the engine, a worm on said crank shaft meshing with the worm wheel, and a casin inclosing said first-mentioned shaft, said JESSEE M. WHITE.

Witnesses:

R. H. KRENKEL, OHAs. E. Po'rrs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G." 

